name='admin'
password='123456'
n=0
while(n<=3):
    iname=input("请输入用户名：")
    ipassword=input("请输入密码：")

    if(iname == name and ipassword == password):
        print("登陆成功！")
        break
    else:
        print("您的用户名或密码错误！")
        break